Add Cursor CLI as target provider

[kieranklaassen]

Summary

• Adds cursor as a fourth target provider alongside opencode, codex, and droid
• Enables --to cursor for both convert and install CLI commands
• Converts Claude Code plugins into Cursor-compatible format:
  • Agents → .cursor/rules/*.mdc (Agent Requested mode, alwaysApply: false)
  • Commands → .cursor/commands/*.md (plain markdown, no frontmatter)
  • Skills → .cursor/skills/ (identical SKILL.md standard, copied directly)
  • MCP servers → .cursor/mcp.json (compatible JSON format)

Key Decisions

• Agent Requested mode: Agents use alwaysApply: false with description set, so Cursor's AI activates rules on demand rather than flooding context with all 29 agents
• Plain markdown commands: Cursor commands don't support YAML frontmatter — description is emitted as an HTML comment
• Name deduplication: Flattened command names (workflows:plan → plan) are deduplicated if collisions occur
• Hooks warning: Plugins with hooks emit console.warn since Cursor has no hook system

New Files

• src/types/cursor.ts — Bundle types
• src/converters/claude-to-cursor.ts — Converter with content transformation
• src/targets/cursor.ts — Writer with double-nesting guard
• tests/cursor-converter.test.ts — 20 converter tests
• tests/cursor-writer.test.ts — 5 writer tests
• docs/specs/cursor.md — Cursor CLI format reference

Test Plan

• All 85 tests pass (25 new + 60 existing)
• Converter handles: agents, commands, skills, MCP, hooks warning, edge cases
• Writer handles: full bundle, double-nesting guard, mcp.json backup, empty bundle
• Content transforms: .claude/ → .cursor/, Task calls, slash commands, @agent refs

Post-Deploy Monitoring & Validation

No additional operational monitoring required: this is a new converter target with no production runtime impact. Users opt-in via --to cursor.

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